期刊
AICHE JOURNAL
卷 62, 期 2, 页码 451-460出版社
WILEY
DOI: 10.1002/aic.15095
关键词
pore network; discrete model; pore blocking; multiphase reactions; hysteresis; hydrogenation of benzene to cyclohexane
资金
- National Basic Research Program of China [2012CB720501]
- National Natural Science Foundation of China [U1162112, 21376076]
- UK's EPSRC Frontier Engineering Centre for Nature Inspired Engineering [EP/K038656/1]
- China Scholarship Council (CSC)
- Engineering and Physical Sciences Research Council [EP/K014714/1, EP/K038656/1] Funding Source: researchfish
- EPSRC [EP/K038656/1, EP/K014714/1] Funding Source: UKRI
A discrete model coupling mass transfer, reaction, and phase change in porous catalyst particles is proposed to probe pore blocking effects on multiphase reactions. This discrete model is validated by comparing the results with experiments and those obtained using a continuum model, for the hydrogenation of benzene to cyclohexane in Pd/-alumina catalyst particles. The results show that pore blocking has a significant effect on the effectiveness factor and can contribute to up to 50% of the hysteresis loop area for multiphase reactions in porous catalysts, indicating that pore blocking must be accounted for. Moreover, the pore blocking effects are significantly enhanced when the pore network is poorly connected and the pore-size distribution is wide, while the pore blocking effects are insensitive to the volume-averaged pore size. Multiphase catalyst material characterization and design should account for this effect. (c) 2015 American Institute of Chemical Engineers AIChE J, 62: 451-460, 2016
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